Method of making pinwheels for clockworks by casting under pressure



June 10 1924.

O. JUNGHANS METHOD OF MAKING PINWHEELS FOR CLOCKWORKS BY CASTING UNDER PRESSURE Filed June 16, 1923 v A w Patented June 10, 1924.

osxen JUNGI-IANS, or SCHB-AMBERG, GERMANY.

METHOD OF MAKING PITUNHEELS FOR CLOCK WORKS BY CASTING- UNDER PRESSURE.

Application filed June 16, 1 223. Serial No. 645,817.

To all whom it may concern:

Be it known that I, Osxan JUNeHANs, a citizen of the German Republic, residing at Schramberg, Germany, have invented certain new and useful Improvements in the lvilethod of Making Pinwheels for Clockworks Casting Under Pressure, of which the following is a specification.

My invention relates to a new method of and a mould for making pin-wheels, preferably of the kind having an elongated hub,

, as usually employed in the manufacture of clock-works and the like.

The object of my invention is to provide means for the manufacture of said pinwheels by way of casting under pressure in a manner that the whole of the wheel body, with the sole exception of the pins, will be obtained. in one piece and, if desired, together with the spur gear affixed thereto and the .iron shaft or arbor insertedtherein, in a single operation.

A further object of my invention is to pro vide a mould particularly adapted for carrying out my improved method, said mould comprising essentially two separate main members or parts, preferably a stationary part and a movable part, in connection with. two sliding members or slides shaped, constructed, and arranged to move, on closing the mould, radially towards each other in order to constitute the portion of the mould corresponding to the free space for the accommodation of the pins.

With the latter purpose in view the aforesaid two slides are provided each with a number of transverse holes extending in equidistant and parallel relationship to each other and to the semi-cylindrical cavity or recess provided in each of the two contact ing end surfaces of the slides to constitute the intermediate cylindrical portion of the mould for the formation of the neck of the pin-wheel intermediate between two bosses of the latter. The said transverse holes, therefore, lie in a circular line around the semi-cylindrical cavities or recesses of the two slides, when the latter are closed and touch each other, and they serve for the reception of wires or pins for the formation of holes in the two bosses to be formed by the cast metal. These wires or pins are slidably located in corresponding holes of the movable part of the mould. The pin-holes thus formed in the cast piece by the said wires or pins serve for the reception of the driving pins.

Before proceeding to describe the details of my improved method and mould I desire to have it understood, that the pin-wheel made in accordance with my invention represents a new article of manufacture in the modern art of casting under pressure and a further advance in the art of making pinwheels for clocks and the like in a ready, efficient and highly economical manner.

The accompanying drawing illustrates by way of example one embodiment of the new mould for carrying out my improved method and the article produced thereby on an enlarged scale. In the drawings- I Figure l is a sectional view of the mould with the cast piece therein, the section being taken through the axis thereof,

Figure 2 is an elevation of the two slides in closed position and with their ends broken away,

Figure 3 is a sectional view of the finished cast piece, and

Figure 4 is a section taken on the line t4.- of Figure 3. r

In the embodiment illustrated in the drawing the mould comprises twoqmain parts a and b not wholly shown but partially broken off, the one part, say the part 6, being supposed to be mounted in a stationary manner in a machine of any suitable construction for opening and closing the multipart mould and for operating at the same time the other parts belonging to and co-operating with the mould. Machines of the kind are generally known to persons versed in the art so that further detailed description thereof is deemed. unnecessary, for it will be understood by those, to whom this specification is addressed, that the now chine and the parts thereof co-operating with and actuating the mould will be of the proper size and relationship, and will be properly mounted and supported according to the tenets of machine construction. Moreover the construction of the machine has noting to do with my present invention and also for this reason there appears to be no necessity for a detailed description thereof.

The movable member part a of the mould is provided with two slides 0 and d adapted to'be moved by the machine or manually towards and from each other in a radial direction so as to be closed or opened. Figure 2 illustrates the two slides separately in closed position in conformity with Figure 1. The contacting faces of the slides are cut out to form semicylindrical recesses e and f, respectively, and the thus afforded free space 6 f receives molten metal for the formation of the neck, that is to say the por tion of the cast piece intermediate between the two bosses or hubs thereof, as wil be clearly understood from an inspection of Figure 1.

In a circular seriesaround the cylindrio l space 6, f a number of parallel holes 9 are provided in the two slides, said holes being equidistant from each other and adapted to receive the sliding pins h for the formation of the holes in the wheeh into which the driving pins are to be inserted. The pins 7L ass through guiding holes 5 in the part a of the mould and their outer ends are rigidly connected with a support 2' which at the same time serves as a means for guiding a pusher Z. The latter is located in coaxial alignment with the cavity of the mould or the cast piece therein and terminates the one end of the same.

The pusher Z serves the purpose of pushing the cast work out of the part (a of the mould and holding the shaft or arbor m like a core in correct position during the casting operation. To this end the forward end of the pusher is provided with an axial bore a and the part 7) of the mould is likewise provided with a bore 0 of the same diameter as the bore n and situated in coaxial alignment with the latter, as shown in Figure 1. The'shaft or arbor m is iutr duced, prior to the casting operation, from the righthand side of Figure 1 into the bore 0 and forced inwards into the position shown in Figure 1 with the aid of a pin or rod 8, so that its inner end will rest with in the pusher Z whilst its outer end is supportcd by the part 5 of the mould.

The inner front face of the part at of the mould is provided with shallow circular recess 9 the center of which coincides with the axis of the arbor m and which is of exactly the same size as the gear q to be united with the cast-piece, in particular with the boss or hub of the latter on the right hand end thereof, as will be readily understood from Figure 1. To this end the gear (1 is to be embedded into the circular recess p, prior to the casting operation.

The stationary part b of the mould is providedon its inner side with a running chan nel "r or the like for the molten metal.

I shall now proceed to describe the method of making a pin-wheel with its arbor and its toothed gear firmly attached thereto, in a single casting-under-pressure operation and with the aid of the hereinbefore de-- scribed multipart mould.

The mould being in open position, first the gear Q is embedded into the recess p of the movable part a of the mould, the said recess being sized and shaped as afore stated, to exactly conform to the size and shape of the gee. so that the latter will snugly tit therein, whereupon the machine is actuated preferably by hand, in order to close the mould with the gear properly held between the two parts a and b. The mechanism of the machine is such that when the part moves toward the part b, the two slides 0 and (Z are simultaneously actuated to radially nove to ds each other in a path perpeir die ilar to that of the moving part a, until they meet and assume the position shown in Figure 2, thus forming the free space e, f of cylindrical shape for the neck portion of the piece to cast. Thereupon the mechanism of the machine acts to advance the support 7: in order to drive the sliding pins it through the holes in the mould part a and through the holes 9' of the two slides aligned therewith, so that the pins 72 assume the position shown in Figure 1. At the end of the closing movement of the mould. part a the arbor m is inserted into the hole 0 and driven in as far as its inner end will be received and supported by the bore a in the pusher Z.

The mould thus being fully closed and all of the parts therein inclusive of the steel arbor m in proper and correct position for the reception of the molten metal, the latter is poured in by means of pressure through the channel 7" in the manner usualin the art of casting under pressure. 7

It goes without saying that the part (a of the mould may be stationary and the part l: be arranged to move to and fro in closing and opening the mould. The cast piece with the gear and the steel arbor m nclosed so that only its bearing ends proect the rom, as will be seen in Figure 3. an inn .vided body with two circular se 1; s of aligned parallel holes for the recepthe driving pins. My improved of making a cast-piece or body of '1 d by means of casting under presaresents a new way and an advance in the art owing to the technical and economical advantages ensured thereby.

lt does not seem necessary to burden this specification with a further exposition of the advantages which the invention possesses nor with detailed description of all of the minute details of the machine, required for opening and closing the mould in the manner and for the purpose hereinbefore set forth. for they will be apparent to those skilled in the art to which my invention relates. I wish it to be understood, however, that changes might be resorted to in the form and arrangement of the several parts shown without departing from the spirit and scope of my invention; hence I do not desire to limit myselfstrictly to the structure herein illustrated and described, but what I claim is 1. A mould for making castings comprising two parts,one of said parts having'pa-rts of its mould wall movable radially with respect to the opening and closing of the mould.

2. A mould for making castings comprising two parts, one of said parts having a pair of sliding parts therein comprising parts of themould wall and adapted to slide radially relative to the openings and closing of the mould to thus removethe casting from the mould.

3. A mould for making castings comprising two parts, one of said parts having a pair of sliding parts therein and all of said parts having a plurality of corresponding guide holes therein; and a support having a plurality of sliding core pins, said pins cooperating with said guide holes.

4. "A multipart mould for making pinwheels for clock-work by casting under pressure, comprising a circular series of removable parallel pins or wires'in theone partof the mould, two .slides' having semi-cylindrical recesses cooperating to formthe space for a ncckto be made in the work to be cast, a corresponding series of parallel holes in the meeting ends of-the said slides for the reception of the said pins or wires and a support carryingthe outer ends of the said pins or wires.

5. A multipart mould for making pin wheels for clock.works by casting under pressure, comprising a circular series of slidable, parallel pins or wires in the one part of the mould, means for supporting an arbor axially in the two parts of the mould, two slides having semicylindrical recesses cooperating to form the space for a neck to be made in the work to be cast, a corresponding series of parallel'holes in the meetin ends of the said slides for the reception. of the said pins :or wires, and a support carrying the outer ends of the said pins or wires.

'6. A multipart mould for making pinwheels for clock-works by casting under pressure, comprisinga circular series ot-slidable pins or wires in the one part of the mould for the formation of the pin-holes in :the work to be cast, a support, a pusher insaidsupport for driving out the cast Work from the mould, a bore in said pusher tor the one end of an arbor to be rigidly enclosed in the casting to lit in, and a corresponding bore in the other part of the mould for-theot-her end-0t said arbor to lie in during the casting operation.

7. A multipart mould for making pinwheels for clock-work by casting under pressure, comprising a circular series of slidable pins or wires in the one part of the mould for the formation of the pin-holes in the workto be cast,two slides" havingesemr cylindrical recesses cooperating to form the space for a neckto be vmadein the Work to be cast, a corresponding seriesof parallel holes in the meeting ends of the 'said'two slides for the reception of the said pinseor wires, a support carrying :the outer ends-of the said pins or wires, a pusher insai-dzsu-pport for driving out the cast work from-the mould, a bore in said'pusher "forzthe one end of an arborto be rigidly encased in the casting, to fit in, and a corresponding'bore inthe other part of themould tort-he other en'dot said arbor to lie induring thecasti-ngoperation. V i i :8. A multipart mould for making pinwheels for clockwork by casting under pressure, comprising a circularseries of 2 pins or wires slidably mounted in the onezpart of the mou'ld, two slides having semicylindrica'l recesses cooperating to form'thespacefor a neck to be made in the work, acor respondi-ng series of parallelholes in the meeting ends 'of t-he said two slides 'for the reception of the inner ends of said pins or wires, a support rigidly connected with the outer ends of the said pins or wires, a pusher in said support for driving out the Feast piece from the mould and extending into the one part of the mould, a;bore in the extending end of said pusherltor the one end of an arborto restin, and a corresponding bore'in the'other part oft-lie mould for the other end of said arbor to lie in during the casting operation.

A. multipart mould 'tor making pinwheels for clock-work by casting under pressure, comprising a circular series of parallel sliding pins or-wires'inthe one part of the mould for'the formation of the pinholes in the piece to be cast, means ifor'sup-. porting an arbor axially .in the two parts of the mould, and a co-aXial circular, shallow recess in the contacting orinner endfa'ce of the one part of the mould .torthe'reception of a gear to be rendere'd integral with the cast piece. l

10. A multipart mould for making 5p'inwheels for zclock-work by casting under pressure, comprising .a circular series of parallel sliding pins or wires in the one part ot'the mould, two slides havingeach a semicylindrical recess cooperating to term the space for a :neck to be made in the casting, a correspondingseries of parallel "holes in the meetingends ot the said two slides for the reception of the said pins or wires, .a support'earrying the outer :ends of said pins or wires, andza coaxial, circular, --shallow=recess in the contacting or inner face of the one part of the mould tor the reception of a gear to be rendered integral with the cast piece.

11. A multipart mould for making pinwheels for clock-works by casting under pressure, comprising a circular series of slid able, parallel pins or wires in the one part of the mould, means for supporting an arbor axially in the two parts of the mould, two slides having semicylindrical recesses cooperating to form the space for a neck in the casting, a corresponding series of parallel holes in the meeting ends of the said two slides for the reception of the said pins or wires, a support carrying the outer ends of the said pins or wires, and a coaxial, circular, shallow recess in the contacting or inner face of the one part of the mould for the reception of a gear to be rendered integral with the cast piece.

12.,A mould for making pin-wheels for clock-works comprising a stationary part; a movable part including" a pair of sliding parts, said movable part and the sliding parts having a plurality of corresponding guide holes therein; and a support having a plurality of sliding pins, said pins cooperating with said guide holes to form the sockets in the pin-wheel for the reception of the driving pins.

13. The method of making pin-wheels for clockworks which consists in the successive steps of inserting a gear into the mould; radially inserting the sliding parts; inserting the core pins through the holes in the mould and sliding parts; pouring the metal; retracting the core pins; retracting the sliding parts: and ejecting the pin-wheel from the mould. I

14. A mould for making castings comprising a stationary part; a movable part having radially slidalole parts therein to'form depressions in the casting; and means in said movable part for ejecting the casting.

l5. A mould for making castings comprising a stationary part; a movable part; slid ing parts in said movable part comprising parts of the mould wall and adapted to slide at right angles to the direction of the opening and closing of said movable part; and means in said movable part for ejecting the casting.

16. A mould for making pin-wheels for clock-works comprising a pair of mould parts; a pair of sliding parts in one of said mould parts comprising parts of the mould wall and adapted to move at right-angles to the direction of the opening and closing of one of said mould parts, and said slid ing parts and mould parts having corresponding guide holes therein; a support having a plurality of sliding pins adapted to be inserted in said guide holes; and means for ejecting the pin-wheel after the sliding pins messes and parts have been retracted to insert the driving pins into the sockets formed in the pin-wheel.

17. The method of making pin-wheels for clock-works comprising spaced bosses where in the pin ends are secured, which consists in inserting the wheel shaft into a mould cavity shaped to form the spaced bosses and connecting hub and also to form perforations in the bosses for the pin ends; pouring the casting metal into said cavity; removing the casting; and inserting the pins into said perforations.

18. The method of making clock-work wheels comprising spaced bosses wherein the pin ends are secured, which consists in pouring the casting metal into a cavity of a mould shaped to form the spaced bosses and connecting hub and also to form perforations in the bosses for the pin ends; and inserting the pins into the holes left in the bosses of the castii'ig after removal from the mould.

19. The method of making wheels for clock-works comprising spaced bosses wherein the pin ends are secured, which consists in inserting the wheel shaft and gear wheel into a mould cavity shaped to form the spaced bosses and connecting hub and also to form perforations in the bosses for the pin ends; pouring the casting metal under pressure into said cavity of the mould; and inserting pins into the holes formed in the bosses of the casting after removal from the mould.

20. The method of making clock-work wheels comprising spaced bosses wherein the pin ends are secured, which consists in pouring the casting metal into a cavity of a mould shaped to conform with the spaced bosses, connecting hub and shaft of the wheel and shaped to form perforations in the bosses; and inserting the pins into the holes left in the bosses of the casting after removal from the mould.

21. The method of making clock-work wheels comprising spaced bosses wherein the pin ends are secured, which consists in inserting the wheel shaft and gear wheel into a mould cavity shaped to form the spaced bosses and connecting hub and also to form perforations in the bosses for the pin ends; pouring the ca sting metal under pressure into said mould cavity around the wheel shaft and gear wheel; and inserting the pins into the holes left in the bosses of the casting after removal from the mould.

In testimony whereof I affixed my signature.

osuae Juuouaus. 

